Pipe-scribing instrument



Jan. 8, 1929.

A. F. DAY

PIPE SCRIBING INSTRUMENT 2 Sheets-Sheet Filed Dec. 2, 1,927

INVENTOR 2" ATTO NEY Jan. 8, 1929.

A. F. DAY

PIPE SCRIBING INSTRUMENT Filed Dec. 2, 1927 2 Sheets-Sheet walla/ 1111!!! 4 I flay INVENTOR a ATTO'e' EY.

Patented Jan. 8 ,192 9. UNITED STATES 'PATENT'J-OFFICE.

ANDREW FRANKLIN DAY, 01 DALLAS, TEXAS.

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Application fled Deeemher 2 1827. Serial No. 237,180.

This invention relates to improvements in pipe degree squares or instruments for making a line on a pipe indicating accurately the portion of the pipe to be cut in fitting and a joining one pipe or portion thereof to another.

The present invention involves the principle employed in applicants ctr-pending application for pipe calipers, filed in the United States Patent 'Oflice on October 24, 1927 Serial Number 228,214.

The particular object of the present invention is .to provide an instrument for defining lines or markings on a pipe at varied angles for joining two pipes together, particularly useful in making pipe-connections in steam and gas connections in oil fields and in various other lines of work where it is necessary to cut pipe accurately in making such joints.

After the mark is made by the instrument,

the pipe may be cut along the line indicated and no further trimming is. necessary to make a perfect joint. I

Fora more complete and full description of the invention, reference is made to the drawings hereunto annexed and made a part a of this specification, and wherein: Y

Figure 1 is a side elevational view of the instrument in'position on a section of ipe. Fi ure 2 is a. cross-sectional view t rough the plpe and indicating a top view of a' guide r igure 3 is a horizontal sectional view taken on the line'3-3 of Figure 1. 5 Fi the ring at the point 44.

Figure 5 is a detail view of one of the parts.

shown in Figure 3. Figures 6, 7, 8 and views of a modified form of the invention, Fi ure 6 being a partial plan view. Figure 7 is a view similar to Figure2. Figure 8 is a cross-sectional view on the line 88, Figure 7.

Figure 9 is a detail sectional view of means for holding a marker, shown in Figure 2; and

Figure 10 is a cross-sectional view on the line 10-10 of Figure 6.

Proceeding in accordance with the drawings and wherein different numerals are employed to designate the various parts ofthe invention, 1 denotes a curved, longitudinal late with adjustable set screws 2 for engagmg the pipe 3. Rigidly connected to or formed integrally with the plate is a vertical v Referring to" Figures 1 and re 4is a cross-sectional view through 10 illustrate various rod 4 of a squared formation in cross-section for engagement with a sleeve 5, the 'sleeve be ng interiorly recessed to complementally receive the rod 5, clearlyshdwn in Figure 3. The sleeve has a threaded opening for the reception of a screw 6 having a knurled knob 7 for holding the sleeve in set position on the rod 4. The sleeve also includes a projecting part 8 with an opening'9, see Figure 5, for insertion of a pivoting and connecting element 10, the head of which indicated atv 11 is circular and bears a scale 12, hereinafter referred to. A knurled nut 13 holds the parts together. I I

I 2: a ring 14, having an annularly centrally disposed rib 14 is provided for the purpose of guide means to guide the marker along andaround the plpe 3. Thls ring is formed integrally with an arm, the latter being recessed as shown in Figure 3 to complementally receive the element 10, the head 11 and a portion of the shank thereof being countersunk in the arm 16. The element 10 passes through the arm 16, projecting part of the sleeve 5 and s the knob 13. I

Seated upon and slidably arranged with the ring 14 1s a clip 17, more clearly shown in Figure 4. The clip has flanges "18 to firmly hold the clip on the ring,-'yet loose enough to allow the clip to move freely around the ring.

Pivoted to the cli is a 'fin ger19. "This finger i has a knurled kno .20 around-which is wound a spring 21'the endslof the spring being attac ed to the'finger and to the clipclearly shown in Figure 2..-T he' clip flanges 18' are preferably secured to the clip by'screws 22 for the purpose of lacing the clip upon the ring in assembllng't e parts.- The arm- 16 has a curved notch 24 to permit the clip to freely pass in its travel around the ring. The finger 19 carries a marker 25 of soapstone or the like to mark the pipe on the line to be out.

In Figure 7 is shown a modification of the invention. Inthis instance, in the place of the ring guide 14, there is provided a horseshoe or substantially U-shaped element 26 with a rib 26 formed integrally with or detachably connected to the arm 16 in the same manner as the ring. This enables the pipe to-be cut at a longer angle than the ring ide, and includes a member 27 with a markmg element 28. The member 27 is detached,

fiat and traveling v the pipe.

along the top of the elem'ent'26 in making the mark. a V

The-plate 1 level A for setting the instrument correctly in lace in connection with the gauge n operation, the late 1 is seated upon the pipe 3 as shown in i urel, the sleeve 5 and the arm 16, carrying t e guide element 14 or 26, are adjustedto desired position and secured in such positions by the screw 7 and nut 13. The finger 19 of .the clip 17 is moved around-the pipe by the knob 20 and the mark is made upon the pipe, all around the pipe.

The. same procedure is lcarried out in the modified, form, except that the member 27' is held by the hand so thatit will ride upon the element 26.'with the marker bearing against The resentdisclosure illustrates apractical em odiment of the invention and of the principle involved, yet obviously other modiand the r0d4 each have a spirit fications may be made tovcome within the Y said arm having its inner endpivoted to said extension for permitting an ular adjustment of said ring relative tosaid support slidably secured on sai ring, and a i ea marker finger pivoted to said support for carrying a a marker to 'resilientl bear against said'pipe to mark the same uring the sliding movement of said marker support on said ring.-

In testimony whereof I aflix my signature.-

ANDREW, FRANKLIN 'DAY. 

